CCSprite: fade 效果切换图片

//CCSprite+Animation.h

#import "CCSprite.h"

@interface CCSprite (Animation)

+ (void)fadeWithOldSprite:(CCSprite *)oldSprite newSprite:(CCSprite *)newSprite callFuncTarget:(id)target callFuncAction:(SEL)action fadeDuration:(NSTimeInterval)duration;

@end

//CCSprite+Animation.m

#import "CCSprite+Animation.h"

#import "CCActionInterval.h"

#import "CCActionInstant.h"

@implementation CCSprite (Animation)

+ (void)fadeWithOldSprite:(CCSprite *)oldSprite newSprite:(CCSprite *)newSprite callFuncTarget:(id)target callFuncAction:(SEL)action fadeDuration:(NSTimeInterval)duration

{

    [oldSprite.parent addChild:newSprite z:oldSprite.zOrder];

    CCFadeOut *fadeOut = [CCFadeOut actionWithDuration:duration];

    CCCallFunc *callFunc = [CCCallFunc actionWithTarget:target selector:action];

    CCSequence *sequence = [CCSequence actionWithArray:@[fadeOut, callFunc]];

    [oldSprite runAction:sequence];

    CCFadeIn *fadeIn = [CCFadeIn actionWithDuration:duration];

    [newSprite runAction:fadeIn];

}

@end

实现3秒切换图片

- (void)startToFadeSprite

{

    static NSString *imageNames[] = {

        @"[email protected]",

        @"[email protected]",

        @"[email protected]",

        @"[email protected]"

    };

    static NSInteger index = ;

    static NSInteger imageCount = ;

    if (index == imageCount) {

        index = ;

    }

    if (fading == NO) {

        fading = YES;

        photoTemp = [CCSprite spriteWithFile:imageNames[index]];

        photoTemp.textureRect = photo.textureRect;

        photoTemp.anchorPoint = photo.anchorPoint;

        photoTemp.position = photo.position;

        photoTemp.scaleX = photo.scaleX;

        photoTemp.scaleY = photo.scaleY;

        [CCSprite fadeWithOldSprite:photo newSprite:photoTemp callFuncTarget:self callFuncAction:@selector(fadeFinished) fadeDuration:0.3];

        index++;

    }

}

- (void)fadeFinished

{

    [self removeChild:photo];

    photo = photoTemp;

    fading = NO;

    CCDelayTime *delay = [CCDelayTime actionWithDuration:2.7];

    CCCallFunc *callFunc = [CCCallFunc actionWithTarget:self selector:@selector(startToFadeSprite)];

    [self runAction:[CCSequence actions:delay, callFunc, nil]];

}

//init

photo = [CCSprite spriteWithFile:@"[email protected]"];

[self addChild:photo];

//just after

[self startToFadeSprite];